SM8222A/B
NIPPON PRECISION CIRCUITS INC.
Caller ID Service IC with Call Waiting
The SM8222A/B is a calling number identification
(caller ID) and call waiting signal (dual tone signal)
receiver decoder IC that conforms with the TR-
NWT-000030 and SR-TSV-002476 (Bellcore) dialer
telephone number display standards. It is imple-
mented in CMOS and incorporates a power-down
function for low power operation.
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Conforms to TR-NWT-000030 and SR-TSV-
002476 (Bellcore) standards
Call waiting
FSK demodulator
Ring signal detect circuit built-in
High input sensitivity
Input gain adjust circuit built-in
Power-down mode
APPLICATIONS
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Telephones that display dialer number before and
during conversation
Adapters to display dialer number before and dur-
ing conversation
ORDERING INFORMATION
D e vice
SM8222AS
SM8222AP
SM8222BS
SM8222BP
lim
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P ackag e
24-pin SOP
24-pin DIP
ina
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FEATURES
Crystal oscillator circuit built-in
Single supply operation
Microcontroller I/O interface
Molybdenum-gate CMOS process
24-pin SOP and 24-pin DIP packages
SM8222A : 2.7 to 3.3V operation
SM8222B : 4.5 to 5.5V operation
Answering machines
Facsimile machines
Computer peripheral devices
PINOUT
(Top View)
pre
24-pin DIP
24-pin SOP
AGND
CAP
RDIN
RDRC
RDET
MODE
OSCIN
OSCOUT
GND
12
13
ry
TIP
RING
GS
1
24
OVERVIEW
VDD
STGT
EST
STD
INT
CDET
DR
DOUT
DCLK
FSKEN
PDWN
IC
NIPPON PRECISION CIRCUITS—1
NPC [ NIPPON PRECISION CIRCUITS INC ]
